Rohde & Schwarz M3SR Series 4100, Руководство по обслуживанию

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Test of Specification R&S M3SR Series 4100 HF Transceivers
3.13 6124.9007.82.01
10 PTT Interface / Audio Matrix / B8E
Transmit
10.1 Set HF power to 100 W. Set transceiver to
mode B8E, TX-frequency 10.7 MHz.
By using the audio analyzer, apply AF signal
of 1 kHz, 0 dBm to X26.10/.40 (Line In USB).
Apply AF signal of 750 Hz, 0 dBm to X26.12/
.42 (Line In LSB).
Set X26.8 (USB_PTT) to GND.
By using the power meter and modulation an-
alyzer, check HF Signal at X30.
> 40 dBm
10.701 MHz (USB)
10.2 Keep X26.8 and set additional X26.23
(LSB_PTT) to GND.
Check HF Signal at X30.
> 40 dBm
10.699250 MHz (LSB)
10.701 MHz (USB)
10.3 Command -20 dB Sidetone attenuation.
Verify default USB audio on Headset/
Speaker.
-20 dB side tone is to be heard.
By using the audio analyzer, check the AF
signal between contacts A and B of HEAD-
SET connector (X7). Frequency: 1 kHz
AF level: 0.4 V
RMS
(+3 / -1 dB) at 300 Ω
Check the AF signal between 1 and 2 of
HEADPHONE connector (X6). Frequency: 1 kHz
AF level:
0.34 V
RMS
(+3 / -1 dB) at 600 Ω
Release X26.8 and X26.23 (USB and LSB
PTT).
No. Activity Nominal Value