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--- cso:instruments:fts:cables [2011-03-08 20:42]
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+++ cso:instruments:fts:cables [2011-03-08 20:43] (current)
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+====== Cabling ======
+<file>
+                                CABLES.TXT
+--------------------------------------------------------------------------------
+Poliahu-[FTS.TEXT]CABLES.TXT  Tacos-[SERABYN.FTS.TEXT]CABLES.TXT        01-30-97
+--------------------------------------------------------------------------------
+IMPORTANT:
+TO AVOID IEEE BUS ERRORS, disconnect all IEEE cables beyond the A/D.
+TO AVOID SPIKES AS MUCH AS POSSIBLE, make sure that there is no ground connection
+between the computer/ADC boxes and the metal strips on the table.
+--------------------------------------------------------------------------------
+This guide describes the cabling setup for the FTS. The electronic components
+include the facility bolometer, our FTS Bessel filter box and FTS Trigger Box,
+the IOtech A/D, the Heidenhain linear encoder, our home-made FTS electronics
+drive box and MOTOR/LIMITS box, the Galil motor controller, and the amplifier
+boxes for the Galil motors. The manuals which describe the equipment inside the
+FTS electronics box (Heidenhain encoder electronics, the switching power
+supply, and the Precision Micro controller board) can be found in a red binder
+in the FTS cabinet on the third floor of the CSO.
+All the electronics on the FTS optics table are plugged into a power strip on
+the table.  Make sure this is turned on before proceeding.
+ 	       FRONT PANEL CONNECTORS ON FTS ELECTRONICS BOX:
++---------------------------------------------------------------------------+
+|                                                                           |
+|                                             [==6==]                       |
+| ((1)) [===2===] [===3===]  [==4==]  [==5==]                          !    |
+|                                               (7)                    *    |
+|                                                                      8    |
++---------------------------------------------------------------------------+
+. Heidenhain Encoder		-> 	Heidenhain gray cable to linear encoder
+.     NOT USED; NOT CONNECTED INTERNALLY
+. Antenna Computer		-> 	DB-conn. to SERIAL PORT 14 cable
+.     NOT USED, and DON'T USE: NOT interchangable with "Encoder 1 Out."
+. Motor Encoder 1 		->	DB-conn. to gray cable to "Motor
+                                          Encoder" on LIMTS/MOTOR box
+. Paddle Box			->	DB-conn. to cable to manual paddle box
+. Motor Drive			->	BNC cable to "Motor Drive" coax
+                                          connector on LIMTS/MOTOR box
+. Power Switch
+.  Fat grey cable (funky European one) to Heidenhain linear encoder on the
+    translation stage. Inside box -> Heidenhain decoding electronics box.
+.  Not connected internally
+.  RS-232 communcations from terminal server (cable with D-connector
+    labelled FTS Serial Port 14 wends its way around the back of the sidecab
+    and circuitously makes its way to the LINOTRONIX terminal server under
+    the Laserprinter).
+    Internally -> Precision Micro motion controller board.  The ribbon cable
+    inside the electronics box must also be plugged in to the controller board.
+.  Internally to Precision Micro i/o channel 2 =>NOT USED<=
+.  Externally to the rotational encoder on the DC motor which drives the FTS.
+    Internally -> Precision Micro i/o channel 1.
+.  To paddle box. Internally to Precision Micro i/o channel 1. Paddle toggle
+    switch must be set to "Board" to send controller commands to the motor.
+.  Motor Drive: provides the drive voltage for the FTS motor. Internally ->
+    Precision Micro i/o channel 1.  The other end of motor coax is connected
+    to the Limit Switch/Motor Box, whence the signal travels to the hard
+    limit switches and back before finally being sent to the motor via a pair
+    of banana pin connectors on the back of the Limit Switch/Motor Box.
+    NOTE: Wrap the motor with heater tape to keep it happy in cold weather. It
+    should be run off a variac with about 20V output.
+Note on 5,6,7: On the Precision Micro board, the channel 1 connector has pins
+    providing the motor drive voltage, and accepting the input from the motor's
+    rotational encoder. To avoid cross-talk, these two signals are carried
+    externally by two separate cables: as listed above, the encoder is on #5,
+    and the motor drive on #7. The paddle box, which also uses the motor drive
+    voltage, is on #6.
+ 	       BACK PANEL CONNECTORS ON FTS ELECTRONICS BOX:
++---------------------------------------------------------------------------+
+|                                                                           |
+|                                                                           |
+|                                                         . .               |
+|          (1)  (2)                                       (3)               |
+|                                                                           |
++---------------------------------------------------------------------------+
+. Reference Pulse Out		-> 	BNC to FTS Trigger box to A/D ch 2
+. Trigger Pulses Out           ->      BNC to FTS Trigger box to A/D trigger
+. AC Power cord                ->      Clean (ORANGE) AC outlet
+.  Reference pulse out on BNC. Internally from Heidenhain decoding box.
+    -> Ref In on FTS Trigger Box, then out of Ref Out on same box, and
+    -> IOtech A/D channel 2
+.  Trigger pulses out on BNC. Internally from Heidenhain decoding box.
+    -> Trig In on FTS Trigger Box, then out of Trig Out on same box, and
+    -> External Trigger BNC on back of IOtech A/D
+    Both Trig In & Trig Out are sent to an oscilloscope.
+--------------------------------------------------------------------------------
+                      MOTION CONTROLLER HAND PADDLE
+                                   ||
+                            +------++------+
+                            |      Up      |
+                            | (1)  !       |
+                            |     Down     |
+                            |              |
+                            |      /\      |
+                            | (2) (  )     |
+                            |      ^^      |
+                            |              |
+                            |    Manual    |
+                            | (3)  !       |
+                            |    Board     |
+                            +--------------+
+. -Switch to toggle between manual and computer operation.  To accept commands
+    from the antenna computer/FTS program, this switch MUST be set to "Board".
+. -Speed control knob for manual motion control.
+. -Motor enable switch.  When (3) is set to "Manual", pushing this switch up
+    drives the translation stage upward. Pushing this switch down, downward.
+    (Up is toward the beamsplitter).
+ --------------------------------------------------------------------------------
+                              LIMIT SWITCH/MOTOR BOX
+                                                   Mtr+ Mtr-
+                                                     o   o
+                           ----------------------------------+
+                          /                                 /|
+                         /                                 / |
+                        /                                 /  |    Encoder
+                       -----------------------------------   |
+                       | hard limits       soft limits   |   | <-  [====]
+                       |   o    o            o    o  (-) |   |
+                       |                     o    o  (+) |   |
+                       |                                 |   |
+                       |                                 |  /
+                       |     ( )             [======]    | /
+                       | Motor Drive       Motor Encoder |/
+                       ----------------------------------+
+The "Motor drive" and "Motor encoder" connectors are cabled to the
+corresponding connectors on the FTS electronics box.  Encoder and motor cables
+are kept separate to avoid crosstalk.  The Motor+ and Motor- banana connectors
+and encoder connector in the back of the box must also be plugged into the
+motor. There are two sets of limit switches on the stage: hard and soft.  Hard
+limits cut off all power to the motor when they are tripped.  In contrast, the
+soft limits are connected to the Motion controller card inside the FTS
+electronics box via the motor encoder cable, and allow the stage to be stopped
+by software before it reaches the point of no return.  Make sure top (+) and
+bottom (-) limit switches are plugged in to their appropriate sockets.
+--------------------------------------------------------------------------------
+          FTS TRIGGER BOX (in control room; power switch in back)
+   -Trigger In & Reference In from the FTS electronics box via BNCs which
+    go through the air vent. Trigger In also to oscilloscope.
+   -Trigger Out to IOtech A/D External Trigger via BNC. Also to oscilloscope.
+   -Reference Out to A/D channel 2 via BNC.
+   -NOT USED WITH NEW 10 MICRON ENCODER: Sample Select from back of IOtech D/A
+    via special BNC cable with edge connector. Provides 0 or 5 V depending on
+or 10 micron sampling, respectively.
+--------------------------------------------------------------------------------
+	FTS BESSEL FILTER BOX (in control room; power switch in back)
+   -IN: raw signal from "Bolometer" coax
+   -OUT: filtered signal to A/D channel 1
+   -Zero DC offset and select 3 dB frequency cutoff using the two knobs.
+The Bessel filter is normally set to 80 Hz. The 6-pole Bessel filter provides
+maximally flat phase response. The Bessel filter box also includes a 20 kHz
+-pole RC low pass filter to try to eliminate high freq. spikes. It can be
+removed if desired. The signal from the Bessel filter is inverted by FTSRUN.
+--------------------------------------------------------------------------------
+  	      IOTECH A/D model ADC488/16A (in control room)
+     Used in differential mode.
+bit, -5 to 5 V A/D (corresponding to +/- 30000 DN). 1 bit = 0.167 mV.
+     Uses IOtech model SCSI488/D to convert from SCSI to IEEE488/GPIB.
+     Use the short GPIB cable: * LONG GPIB CABLES GIVE IEEE ERRORS *
+     Dip switches inside A/D: S102-open, S103-closed, but it matters little.
+    -External Trigger In from Trig Out on FTS Trigger Box via BNC
+    -D/A output on edge connector to Sample Select on FTS Trigger Box via BNC.
+     Uses hybrid edge-connector/BNC thing.
+    -Analog Inputs: 	Channel 1 = Bolometer		Channel 2 = Ref Pulse
+     Use special D-connector to 2 BNC cable thing. Each channel has three pins
+     available: Hi, Lo, and Ground. The connector is wired so that for channel
+only, Lo and Ground are shorted together. Since the bolometer and Bessel
+     filter box both float, the bolo ground is thus defined at the A/D input.
+  Pins in 	 1: Ch 1 Hi			15: Ch 2 Hi
+D-connector:	 2: Ch 1 Lo			16: Ch 2 Lo
+: Ch 1 Ground, tied to 2	 3: Ch 2 Ground: no connection
+--------------------------------------------------------------------------------
+		  	       GALIL CABLING
+The Galil is currently mounted on the LINOTRONIX terminal server port 2. The
+terminal server is connected to the back of the Galil Control box in the
+sidecab. A thick gray cable sends the signals from the control box (via a
+iconnector on its backside marked "holo") to the amplifier box (via its "Galil
+Control" connector) which, along with its transformer box, is mounted on the
+FTS optical table. The only cable to be disconnected from these boxes is the
+"Galil Control" cable, which comes through the hood on the platform. Always
+leave all other cables connected to the two Galil boxes, even in storage.
+From the amplifier box, 4 cables (2 pairs) go to the DC motors which drive the
+rotating mirror. Each pair of cables consists of an encoder cable to the DB
+connector on the bracket, and a motor drive cable, which first splits into a
+pair of black and white wires, and then goes to two separate "slip-on"
+connectors. The correct motor/cable combinations are marked with Y & Z on the
+cables and on the FTS bracket. The labels "black" and "white" are also written
+on the motors near the correct slip-on connectors.
+--------------------------------------------------------------------------------
+     			       BOLOMETER CABLING
+    The bolometer "output" signal is transported via a BNC cable to the control
+room through the air vent and above the ceiling panels. Normal gain for low
+frequency filters is 5000. The signal is first sent to the low-pass Bessel
+filter box. After filtering, the bolometer signal goes into channel 1 of the
+IOtech A/D via the 2-BNC to D-connector thing. The signal is also T'd off at
+the input to the A/D and sent to the strip chart, which is used for pointing.
+Disconnect the strip chart for observing!
+For operation of the bolometer with the FTS, the preamp gain should normally be
+set to 5000. However, FTSRUN will inform you if it wants a different setting
+for a given gain. It is important to remember to
+               !!!! CHANGE AMP BATTERIES EVERY 6-8 HOURS !!!!
+The preamp batteries need only be changed once every few days. The capacitor in
+the high pass filter inside the bolometer has been changed, to lower the
+filter's cuton frequency (to flatten the phase in the passband). A 33 microfarad
+capacitor is soldered in parallel with a 10 microfarad capacitor already in the
+preamp to give a time constant of 0.4 sec, or a cuton frequency of about 0.4 Hz.
+This is now left in place for all bolometer observing. In addition, for FTS
+spectroscopy, we also add a clip lead with 50 muf, to lower the cuton to 0.1 Hz.
+</file>