HSX Series User Manual 1.14
www.holzworth.com
Page
19 of 32
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
Internal
100MHz
OCXO
100MHz Reference Out
10MHz Reference Out
None (free running)
ACTIVE
Matches Internal 100MHz OCXO
Divided from internal 100MHz OCXO.
10MHz Signal applied
ACTIVE
Based on:
Internal 100MHz OCXO (>20Hz OS)
External 10MHz (<20Hz OS)
Divided from:
Internal 100MHz OCXO (>20Hz OS)
External 10MHz (<20Hz OS)
100MHz Signal applied
ACTIVE
Based on:
Internal 100MHz OCXO (>20Hz OS)
External 100MHz (<20Hz OS)
Divided from:
Internal 100MHz OCXO (>20Hz OS)
External 100MHz (<20Hz OS)
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
Description
AUTO
Synthesizer
adjusts
attenuator
automatically
HIGH
Attenuator set to 0dB state. Valid for
power 5dBm to +20dBm
NORMAL
Attenuator sets from 10dB to 120dB.
Valid for all power levels +5dBm and
below. 0dB (high power) state disabled
FIX
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)
Attenuator State
Power Level
120dB
110dB
100dB
90dB
80dB
70dB
60dB
50dB
40dB
30dB
20dB
10dB
0dB
≤
-105.00dBm
≤
-95.00dBm
≤
-85.00dBm
≤
-75.00dBm
≤
-65.00dBm
≤
-55.00dBm
≤
-45.00dBm
≤
-35.00dBm
≤
-25.00dBm
≤
-15.00dBm
≤
-5.00dBm
≤ +5.00dBm
>
+5.00dBm
Table 1: Atten. Mode Descriptions
Table 2: Atten. States
