
8712ET/ES and 8714ET/ES Service Related Menus
RF Network Analyzers Analog Bus Menu
Service Guide 5-17
7 ALC PIN modulator Voltage to ALC PIN modulator on the source board.
This value increases as the source power increases.
Normal values range from 3.0 to 10.5 volts.
A5 Receiver Assembly Nodes
8 +5 V on RCVR +5 V power supply on the receiver board. Normal
values are 4.5 to 5.5 DC volts.
9 +15 V on RCVR +15 V power supply on the receiver board. Normal
values are 13.5 to 16.5 DC volts.
10 −15 V on RCVR −15 V power supply on the receiver board. Normal
values are −16.5 to −13.5 DC volts.
11 X Det Temperature X detector temperature (ITEMPX on the receiver
schematic). A typical value is 30 degrees Celsius
when a detector is connected. If no detector is
connected, the typical value is around 0° Celsius.
12 Y Det Temperature Y detector temperature (ITEMPY on the receiver
schematic). A typical value is 30° Celsius when a
detector is connected. If no detector is connected,
the typical value is around 0° Celsius.
13 B*/Y Autozero Offset used for the B chopper on the receiver board
(BOFFSET on the schematic). Typical values are
−12.0 to +12.0 volts.
14 R*/X Autozero Offset used for the R chopper on the receiver board
(ROFFSET on the schematic). Typical values are
−12.0 to +12.0 volts.
15 B* Detector Temp Temperature of B* internal detector on the receiver
board (BTEMP on the schematic). Typical values
are 20 to 60° Celsius; this will depend on the
ambient temperature. Not available on 8714ET/ES.
A3 Frac-N Assembly Nodes
16 VCO Output Detector Detector off = 0 V or Detector on < −.2 V
17 VCO Bias Supply Normal ranges are −6.0 V to −2.0 V.
19 +5 Reference Normal values are +4.75 V to +5.25 V.
18 VCO Voltage Drive The 8714 range is −5.5 V to +8 V, while the 8712
range is −3.1V to +7.3 V.
20 10 Mhz Oscillator Supply Normal values are +4.7 V to +5.3 V.
21 +15 V Supply Normal values are +13.5 to +16.5 DC volts.
Number Name Description
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