Assembly Removal and Replacement, MS202xC 6-19 Replacing GPS Receiver Module (Option 31) –
MS20xxC MM PN: 10580-00307 Rev. D 6-37
6-19 Replacing GPS Receiver Module (Option 31) – ND70320
This replacement procedure provides instructions for replacing the GPS Receiver Module mounted on the Main
PCB Assembly for all variants of the MS202xC vector network analyzers. The basic procedure is to open the
case, remove the VNA PCB Assembly, and then service the GPS Module.
Part Numbers
• ND70320 – GPS Receiver Module, Option 31
• For MS202xC instruments equipped with Option 31 GPS Receiver
• Includes SMA connector and cable to Receiver Module
• Does not include GPS Antenna 2000-1528-R
Procedure
Opening the Case:
1. Open the case as described in Section 6-16 “Opening the Instrument Case” on page 6-24.
Removing Power Monitor PCB Option 5:
2. If the Power Monitor PCB (Option 5) is NOT installed, then skip ahead to Step 3. If the Power Monitor
PCB is installed, then perform the following sub steps:
a. Refer to Figure 6-13 on page 6-27 for Power Monitor PCB connectors and orientation. Pry out the
flex cable that is attached to the Detector connector from the Power Monitor PCB.
b. Remove the three Phillips-head screws from the Power Monitor PCB.
c. Using the Tool T1451 socket, remove the BNC Connector Dress Nut from the Ext Trig Input
connector. Leave the Ext Trig Input connector and its attached coaxial cable loosely in place in the
top connector panel.
d. Holding the Connector Flex Cable away from the Power Monitor PCB, gently lever up the PCB out
of its header socket.
e. If the Header Pins stay on the VNA PCB Assembly, then remove the pins and reinstall them on
the Power Monitor PCB.
f. Set the Power Monitor PCB assembly with header pins aside.
g. Removing the Power Monitor PCB provides access to the Ext Trig Input BNC connector and a
VNA PCB Assembly mounting screw.
Disconnecting GPS Antenna Cable:
3. Disconnect the GPS Antenna SMA connector from the top connector panel by performing the following
sub steps:
a. Use two 5/16 inch (≅ 8 mm) end wrenches to disconnect the GPS Antenna SMA connector from the
top connector panel.
b. Pull off the nut and lock washer and remove the SMA connector from the top Connector panel.
c. Route the cable to the right side, clearing its notch and the top connector panel, so that it is clear of
the VNA PCB Assembly and the Case Front Assembly.
Removing Ext Trig Input BNC Connector:
4. Cut the cable tie (if used) that holds the Ext Trig Input and Ext Ref Input coaxial cable to the RF Out
semi-rigid.
Note
Replacing the nut and lock washer on the SMA connector after removal keeps all related parts
conveniently located.
To Next Page
Loading...
Need help?
General
