Reference Output; Attenuator Mode - Holzworth Instrumentation HSX Series User Manual

7.2.3 REFERENCE OUTPUT

Holzworth multi-channel synthesizer modules supply very clean 10MHz and 100MHz
Reference Outputs under all operating conditions.
An outline of the reference input vs. output configuration is captured as follows:
Reference Input
None (free running)
10MHz Signal applied
100MHz Signal applied

7.2.4 ATTENUATOR MODE

NOTE: The following information applies to OPT-n03 (3GHz) and OPT-n06 (6GHz)
channels only.
Holzworth HSX synthesizer channels are equipped with an attenuator module to allow
for very high dynamic range. There are four different modes the attenuator can be
operated in depending on the requirements of the application. Table 1 below describes
each attenuator mode and Table 2 indicates which power levels are available in each
attenuator state. The attenuator mode can be configured by sending the commands
from the power settings section of Appendix A.
Attenuator Mode
AUTO
HIGH
NORMAL
FIX
Table 1: Atten. Mode Descriptions
HSX Series User Manual 1.14
Internal
100MHz 100MHz Reference Out
OCXO
ACTIVE Matches Internal 100MHz OCXO
Based on:
ACTIVE Internal 100MHz OCXO (>20Hz OS)
External 10MHz (<20Hz OS)
Based on:
ACTIVE Internal 100MHz OCXO (>20Hz OS)
External 100MHz (<20Hz OS)
Description
Synthesizer adjusts attenuator
automatically
Attenuator set to 0dB state. Valid for
power levels +5dBm to +20dBm
Attenuator sets from 10dB to 120dB.
Valid for all power levels +5dBm and
below. 0dB (high power) state disabled
Attenuator state fixed to whichever
state it is currently in (e.g. if the
synthesizer is in the 10dB attenuator
state and the FIX command is sent, it
will remain in the 10dB state and not
allow power levels outside of this state)
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10MHz Reference Out
Divided from internal 100MHz OCXO.
Divided from:
Internal 100MHz OCXO (>20Hz OS)
External 10MHz (<20Hz OS)
Divided from:
Internal 100MHz OCXO (>20Hz OS)
External 100MHz (<20Hz OS)
Attenuator State Power Level
≤ -105.00dBm
120dB
≤ -95.00dBm
110dB
≤ -85.00dBm
100dB
≤ -75.00dBm
90dB
≤ -65.00dBm
80dB
70dB ≤ -55.00dBm
≤ -45.00dBm
60dB
50dB ≤ -35.00dBm
≤ -25.00dBm
40dB
30dB ≤ -15.00dBm
≤ -5.00dBm
20dB
≤ +5.00dBm
10dB
0dB > +5.00dBm
Table 2: Atten. States
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