REAR INTERFACE INFORMATION
FUNCTIONS AVAILABLE AT REAR
CONNECTOR
Slots exist between pins 17 and 18 and 6 and 7 on the
rear interface connector. The slot between pins 6 and 7
identifies the AA 501 as a member of the TM 500 family.
Insert a barrier in the corresponding position of the power
module jack to prevent noncompatible plug-ins from
being inserted in slots wired for the AA 501. This protects
the plug-in if specialized connections are made to that
compartment. Consult the Building A System section of
the power module manual for further information. Signal
inputs, outputs, or other specialized connections may be
made to the rear interface connectors as shown in the
input output assignmentsillustration (Fig. 5-6).
Adescrip-
tion of these connections follows.
+
and
-
lnput Connectors (28B, 28A)
These terminals are connected to the input of the
AA 501 when the REAR
INTFC INPUT button on the front
panel is pressed. The front panel INPUT connectors are
disconnected in this mode. The characteristics of these
terminals are identical with t he front panel INPUT connec-
tors except the maximum input voltage is limited to
42
V
peak or 30 V rms. Due
tothe possibility of crosstalk at the
rear interface, noise and distortion performance may be
degraded.
lnput Common (27B, 27A)
These are the common (ground) connections for the
rear interface input.
Auxiliary lnput (25B)
This terminal is connected in parallel with the front
panel AUXILIARY INPUT connector. Maximum input
voltage is 15 V peak and limited to 6 V peak for linear
operation.
Function Output Ground (24B)
Usethis connector forthereturn circuit forthefunction
out put.
lnput Monitor (24A)
This terminal is in parallel with the front panel INPUT
MONITOR connector.
lnput Monitor Ground (23A)
Use this connector as the return circuit for the INPUT
MONITOR.
SMPTE HF Output (21B)
The high frequency component of a SMPTE test signal
is provided at this jack. This signal can be monitored on a
spectrum analyzer or oscilloscope. The range is typically
from 0.5 V to 3 V. The amplitude varies with the input
signal level and the low to high frequency amplitude ratio.
The output impedance is
2
kn.
SMPTE HF Output Ground (22B)
Usethis connector as the ground return forthe SMPTE
HF output.
Converter Output (20A)
This connector provides a dc output from the ac to dc
converter. This level corresponds to the average or rms
output as selected on the front panel. The output level is
1 V
*5%for a 1000 count display. Thesource resistance is
500
n
k50/0.
dB Converter Output (19B)
This connector provides a dc output from the
Auxiliary Input Ground (26B)
logarithmic dB converter. The output voltage is 10 mV
*5% for each
1
dB on the display. Thesource resistance is
Use this connection as a ground return fortheauxiliary
1
kn*5%. Changes in input level rangeor distortion range
input.
will cause brief ac transients.
Function Output (23B) dB Converter Output Ground (20B)
This connector is in parallel with the front panel Use this connector as the ground return for the dB
FLlNCTlON OUTPUT connector. converter output.
Scam
by
ARTEK
MEDL4
*
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