R&S SMJ100A, Руководство по эксплуатации

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Hardware Interfaces
R&S
®
SMJ100A
825 Operating Manual 1403.7458.32 ─ 14
Table A-2: Pin assignment of the AUX I/O Connector connector
Pin Signal Description
1 .. 25 Ground
⊥
Ground
26 LEV ATT Signal input/output for controlling the level attenuation.
With external envelope curve control ("Custom Digital Modulation" only),
the pin is the input for the control signal LEV_ATT.
With internal envelope curve control, the control signal LEV_ATT is output
for Path A.
27 CW MODE Signal input for controlling the switchover between the modulated and
unmodulated RF signal with activated external modulation/CW switching in
the "Custom Digital Modulation" menu.
Signal output for the CW control signal with internal source selected. This
signal marks the CW mode in which digital modulation is deactivated and
the RF signal is output in unmodulated form. In the case of digital stand-
ards with selectable modulation mode, the signal indicates the active mod-
ulation mode (GSM: (G)MSK = high, 8PSK EDGE = low).
28 not used not used
29 .. 38 PARDATA0 ..
PARDATA9 Parallel data input/output 0...D with 10-bit word width for digital modulation.
If the data source "External Parallel" is selected, these pins are the data
inputs.
If a different data source is selected, the data is output here ("Custom Digi-
tal Modulation", Path A).
39 USER 3 USER input/output which can be configured for various purposes.
40 USER 4 USER input/output which can be configured for various purposes.
41 MARKER 3 Output for the freely programmable marker signal 3 of Path A. The output is
permanently assigned.
42 not used not used
43 not used not used
44 not used not used
45 BURST Signal input/output for controlling the burst ramp.
With external envelope curve control ("Custom Digital Modulation" only),
the pin is the input for the control signal "BURST_RAMP".
With internal envelope curve control, the control signal "BURST_RAMP" is
output for Path A.
46 EXT TUNE Tuning input for the internal reference frequency.
47 BITCLK Output Bit clock for internal mode.
48 USER 2 USER input/output which can be configured for various purposes.
49 SYMBCLK Symbol clock output for internal mode.
50 not used not used
AUX I/O Connector