Rohde & Schwarz CMU 200 - Ref out 1

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.