Manual Test Procedure R&S CMU
1100.4903.82 1.10 E-5
REF OUT 1
The level and frequency are checked.
I
nt. 10 MHz:
Set R&S CMU to internal reference.
Measure at REF OUT 1: 10 MHz, level > 1.4 V(pp).
REF IN
signal:
Set R&S CMU to external reference.
Feed in at REF IN: 52 MHz TTL, (as an alternative +16 dBm from signal)
Measure at REF OUT 1: 52 MHz, level > 1.4 V(pp).
Measure at REF OUT 1: frequency 52 MHz ± 1 Hz
Feed in at REF IN: 1 MHz TTL, (as an alternative +16 dBm from signal
generator).
Measure at REF OUT 1: 1 MHz, level > 0.5 V(rms) (1.4 V(pp)).
Measure at REF OUT 1: frequency 1 MHz ± 1 Hz.
REF OUT 2
The level and frequency are checked. The R&S CMU and the frequency counter must be synchronized
(test setup REF2).
REF OUT 2
signal
13 MHz or 10 MHz:
Set R&S CMU to external reference.
Feed in at REF IN: 10 MHz sinewave, 0.5 V(rms).
Set R&S CMU to REF OUT 2 13 MHz or 10 MHz (depending on SW; menu
Connection Control – Sync.).
Measure at REF OUT 2: 13 MHz or 10 MHz, level > 1.0 V(pp).
Measure at REF OUT 2: frequency 13 MHz or 10 MHz ± 1 Hz.
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