Anritsu Site Master S251B Maintenance Manual
Anritsu Site Master S251B Maintenance Manual

Anritsu Site Master S251B Maintenance Manual

Antenna and cable analyzer
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A l l t e s t I n s t r u me n t s , I n c .
5 0 0 C e n t r a l A v e .
F a r mi n g d a l e , N J 0 7 7 2 7
P : ( 7 3 2 ) 9 1 9 - 3 3 3 9
F : ( 7 3 2 ) 9 1 9 - 3 3 3 2
a l l t e s t . n e t
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T h e t e s t & me a s u r e me n t
e q u i p me n t y o u n e e d a t
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u s e d / r e f u r b i s h e d b e n c h t o p t e s t & me a s u r e me n t
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a v a i l a b l e w i t h c e r t i f i e d c a l i b r a t i o n f r o m o u r i n - h o u s e s t a f f
o f t e c h n i c i a n s a n d e n g i n e e r s .
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t
G e t a q u o t e t o d a y !
C C a l l ( 7 3 2 ) 9 1 9 - 3 3 3 9 o r e ma i l s a l e s @a l l t e s t . n e t .

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Summary of Contents for Anritsu Site Master S251B

  • Page 1 T h e t e s t & me a s u r e me n t e q u i p me n t y o u n e e d a t t h e p r i c e y o u w a n t . A l l t e s t I n s t r u me n t s , I n c .
  • Page 2: Performance Verification

    PERFORMANCE VERIFICATION This manual provides maintenance instructions for Paragraphs 4 through 10 contain tests that can be the Site Master S251B Antenna and Cable Analyzer. used to verify the performance of the Site Master It describes the product and provides performance model S251B having any version of firmware.
  • Page 3: Frequency Accuracy

    NOTE Before continuing, allow a five Use the Spectrum Analyzer marker to minute warm up for the internal measure the center of the response. The circuitry to stabilize. frequency should be 1000 MHz ±75 kHz. Site Master S251B MM...
  • Page 4 Press the soft key. LIMIT measurement errors. Select segment #1 and press ENTER Press the soft key. EDIT SEGMENT Scroll to and set the start START LIMIT limit to –85 dB. Site Master S251B MM...
  • Page 5: Return Loss Verification

    · RF Detector, 10 MHz to 20 GHz, Equipment Required: Anritsu 560-7N50B · 10 dB Attenuator, Weinschel 1R-10 · 20 dB offset, Anritsu SC5270 · 30 dB Attenuator, Weinschel 1R-30 · 6 dB offset, Anritsu SC5237 · RF Reference Source, 0.050 GHz, ·...
  • Page 6 CLEAR START AUTO SCALE SAVE RECALL SETUP SETUP DC Power Supply 2000-933 LIMIT MARKER ENTER SAVE RECALL DISPLAY DISPLAY HOLD PRINT MODE FREQ/DIST AMPLITUDE SWEEP Site Master w/ Option 5 Installed Figure 5. Power Monitor Verification Site Master S251B MM...
  • Page 7 · Offset SWR Autotester, a reading of 14.8 to 15.3 Volts, and 120 to Anritsu 560-97A50-20 160 milliamps. · Precision Airline, Anritsu 18N50 · Open/Short, Anritsu 22N50 · 50 Ohm Termination, Anritsu 26N50 · Source Adapter, Anritsu 34NN50A Open/Short 50 Ohm Termination Termination...
  • Page 8 SWR Autotester test port. Position tion to the beadless end of the air line. the air line pointing vertically upward. Press the key to start the calibra- Select Downward or horizontal positions make tion process. connector pin alignment difficult. Site Master S251B MM...
  • Page 9 SM/PL termination should be 42 dB. PRESS SELECT CURSOR MENU START: 0.0100 GHz STOP: 20.0000 GHz 2 GHz/DIV 401 pts LEVEL +7.0 dBm Figure 8. Direct Readout of the Precision Return Loss Site Master S251B MM...
  • Page 10: Battery Pack Removal And Replacement

    Lift the door and remove, as illustrated in Figure 11. Grasp the battery lanyard and pull the bat- tery straight up and out of the unit, as illus- trated in Figure 12. Figure 13. Battery Orientation Site Master S251B MM...
  • Page 11: Battery Information

    · Batteries must be recycled or disposed of prop- erly. Do not place batteries in household gar- bage. Figure 14. Site Master S251B Battery · Always use the battery for its intended purpose · The Nickel Metal Hydride (NiMH) battery sup- only.
  • Page 12: Front Panel Assembly Removal And Replacement

    Figure 16. Corner Bumper Detail Carefully depress the latch tab and discon- nect the LCD display cable from J12 on the main PCB. Carefully disconnect the keypad interface ca- ble from J1 on the main PCB. Site Master S251B MM...
  • Page 13: Lcd Assembly Replacement

    Figure 18. Front Panel Keypad PCB Location Remove the rubber cushion pad from the LCD assembly and remove the assembly. Reverse the above steps to install the re- placement assembly. Reverse the above steps to install the re- placement assembly. Site Master S251B MM...
  • Page 14: Key Pad Membrane Replacement

    PCB. NOTE The main PCB connector panel fits into grooves in the two halves of the Site Master case. Make sure the panel is correctly aligned with the grooves before reassembling the two halves together. Site Master S251B MM...
  • Page 15: Replaceable Parts

    Foam, Battery Door 46649-1 Membrane Keypad, Main 48271 Foam, Battery Compartment Hardware 720-19 Cable Clamp 790-515 Spring, Battery Compartment 900-160 Pan Head Screw, 4-40, 0.875 52680 ID Label, Model S251B 900-861 Pan Head Screw, 4-20, 0.365 Site Master S251B MM...
  • Page 16 Table 2. Anritsu Service Centers UNITED STATES FRANCE JAPAN ANRITSU COMPANY ANRITSU S.A ANRITSU CORPORATION 685 Jarvis Drive 9 Avenue du Quebec 1800 Onna Atsugi-shi Morgan Hill, CA 95037-2809 Zone de Courtaboeuf Kanagawa-Prf. 243 Japan Telephone: (408) 776-8300 91951 Les Ulis Cedex...

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