HP 8921A Operation & User’s Manual

Text of HP 8921A User Guide:

• HP 8921A, Index 585 O octal code for CDCSS encoder, 315 Off Time Signaling Decoder screen, DTMF mode, 238 Signaling Decoder screen, Tone Seq mode, 283 Signaling Encoder screen, DTMF mode, 325 Tone Sequence encoder, 380 offset example, 79 for dc bias, 434 frequency, RF generator/analyzer, 206 frequency, tracking generator, 458 measurement, zeroing, 99 RF generator/analyzer, 212 RF level, 211 setting, frequency, 79 tracking generator, 457 vertical, oscilloscope, 393, 395 Offset Freq (Tracking Gen) Spectrum Analyzer screen, 458 off-the-air measurements, 91, 295, 422, 503, 508 On Time Signaling Decoder scre

• HP 8921A, 307 Chapter 10, Signaling Encoder (AF Generator 2) AMPS-TACS NAMPS-NTACS Encoder Message (FOCC) Figure 60 AMPS-TACS/NAMPS-NTACS FOCC Message and Filler Data Format Message streams A and B specify various forward control channel parameters. Operating Considerations Like the filler information, the message information can only be input in full (seven digit) lines. Also, message streams A and B must have the same number of lines in them.

• 436 Chapter 18, RF Generator Screen Field Descriptions SINAD This is the default measurement for this field. Selecting this field displays the following measurement choices: SINAD Distortion SNR (Signal to Noise Ratio) AF Frequency DC Level Current - DC only Operating Considerations This is a priority control field. Accessing the RX TEST or TX TEST screen overrides any changes m

• HP 8921A, 592 Chapter 25, Modifications, Accessories, Manuals, Support Accessories Manuals (English and non-English) a. Shipped inside instrument impact cover Table 17 Manuals Description Language Option HP 8921A Quick Reference Man- ual a English -- 08920-90010 Quick Reference Card English -- 08920-90014 HP 8921 User’s Guide English -- 08921-90022 Instrument BASIC Lan- guage Reference English -- E2083-90000 Programmer’s Guide English -- 08920-90204 Assembly Level Repair Manual English -- 08920-90168 User

• 296 Chapter 9, Duplex Test Screen Field Descriptions Output Port This field selects the RF Generator’s output port. Operating Considerations Maximum signal levels at each port are printed on the front panel. CAUTION: Applying reverse RF power to the DUPLEX OUT connector can damage the instrument. (A message is displayed when an overpower conditions occurs.) Whenever possible, use

• HP 8921A, 265 Chapter 8, Signaling Decoder Screen NMT Decoder Input Level This field specifies the signal level that you input. The higher the level of signal expected by the analyzer, the higher the trigger level is set. Operating Considerations The unit-of-measure is determined by the AF Anl In setting. The input level should be set high enough to prevent false triggering, but low enough to allow triggering for fluctuating signal levels. De-emphasis can greatly affect the input level required for proper decoding. When decoding NMT data streams, you should turn de-emphas

• HP 8921A, 601 Chapter 25, Modifications, Accessories, Manuals, Support HP Support for Your Instrument HP Support for Your Instrument Parts and service for your Test Set can be ordered by contacting the nearest Hewlett-Packard regional sales office listed in table 19, "Regional Sales Offices" on page 601 . Customer Training Hewlett-Packard offers customers a variety of training materials and classes that explain the theory and applications of many HP products. Contact your HP regional sales office to arrange training for you or your group. Table 19 Regional Sales Offices United States of America U.S. Instrument Support Center For Test & Measureme

• HP 8921A, 302 Chapter 10, Signaling Encoder (AF Generator 2) AMPS-TACS NAMPS-NTACS Encoder Figure 57 AMPS-TACS Mode Forward Voice Channel (FVC) Figure 58 NAMPS-NTACS Mode Forward Voice Channel (FVC) AFGen2 To This field determines whether the data stream modulates the RF Generator, or is output through the AUDIO OUT connector. Audio Out Audio output coupling selects ac or dc coupling of the AF Generator to the AUDIO OUT connector when AFGen2 To is set to Audio Out. amps-en3.wmf nmps-en1.wmf

• HP 8921A, 518 Chapter 24, Connector, Key, and Knob Descriptions Connector Descriptions 1. nStrobe 2. Data 1 (Least Significant Bit) 3. Data 2 4. Data 3 5. Data 4 6. Data 5 7. Data 6 8. Data 7 9. Data 8 (Most Significant Bit) 10. nAck 11. Busy 12. PError 13. Select 14. nAutoFd 15. nFault 16. nInit 17. nSelectIn 18. Signal Ground (nStrobe) 19. Signal Ground (Data 1 and Data 2) 20. Signal Ground (Data 3 and Data 4) 21. Signal Ground (Data 5 and Data 6) 22. Signal Ground (Data 7 and Data 8) 23. Signal Ground (Busy and nFault) 24. Signal Ground (PError, Select, and nAck) 25. Signal Gr

• HP 8921A, 41 Chapter 1, Get Started Accessing the Test Set’s Screens Accessing the Test Set’s Screens List of Screens The following table lists all the screens that could be provided by the Test Set. Table 2 Analog Measurement Screens Instrument Configuration Screens Adjacent Channel Power Configure AF Analyzer I/O Configure Decoder Print Configure Duplex User Assistance Screens Encoder Help Oscilloscope Message Radio Interface Service Assistance Screen RF Analyzer Service RF Generator Call Processing Screens

• HP 8921A, 270 Chapter 8, Signaling Decoder Screen Using the NMT Decoder/Encoder Required Test Set Settings The following Test Set settings should be made before using the NMT Encoder/ Decoder screens. These settings assume the Test Set is in its preset state. RF Generator Settings AFGen1 To: Audio Out and Off AFGen2 To: FM and 3.5 kHz RF Analyzer Settings Tune Mode: Manual Input Atten: Hold and 0 dB Squelch: Fixed AF Analyzer Settings AF Anl In: FM Demod Filter 1: 300Hz HPF Filter 2: 15kHz LPF De-Emphasis: Off

• HP 8921A, Contents 13 1 Get Started Before Connecting a Radio 40 Accessing the Test Set’s Screens 41 Changing A Field’s Setting 43 How do I Verify that the Test Set is Operating Properly? 46 Instrument Functional Diagram 47

• HP 8921A, 310 Chapter 10, Signaling Encoder (AF Generator 2) AMPS-TACS NAMPS-NTACS Encoder Message/DST (FVC) This field is available only in NAMP-NTAC mode. This field determines what type of data is sent when Send is selected: 1. Selecting Message causes the contents of the Message field to be output. 2. Selecting DST causes the digital signaling tone sequence to be output. The sequence sent is the inverse of the sequence entered in the DSAT field, and is automatically de- termined by the Encoder. The DST values are: DAA934, D

• HP 8921A, 260 Chapter 8, Signaling Decoder Screen MPT 1327 Decoder Detecting and Querying Messages IBASIC can be informed about the arrival of a message in the decoder buffer. To do this, configure the HP-IB status registers to cause a service request (SRQ) on the negative transition event of bit 12, “Decoder Result Available” in the Hardware Status Register #1. For further information on the Hardware Status Register refer to the Programmer’s Guide. The message is read from the decoder buffer by the command: MEASure:DECoder:MPT1327:BUFFer? This query returns a quoted string comprising the contents of one or more timeslots

• 382 Chapter 11, Help Screen Field Descriptions Field Descriptions The HELP screen is used to access tutorial information for a wide variety of instrument functions. After this screen is accessed, push the cursor-control knob to display the help Index. The knob is then used to select the desired topic. Once you have accessed the desired information, you can

• HP 8921A, 96 Chapter 5, AF Analyzer Screen Block Diagram Block Diagram Figure 12 AF ANALYZER Functional Block Diagram 1 The Settling, Gain Cntl, and Ext Load R fields are not shown. 2 Variable Frequency Notch if purchased. - +

• HP 8921A, Contents 22 10 Signaling Encoder (AF Generator 2) Field Descriptions for Encoder Modes 300 AMPS-TACS NAMPS-NTACS Encoder 301 Using the AMPS-TACS, NAMPS-NTACS Encoder 313 CDCSS Encoder 314 Using the CDCSS Encoder 318 Digital Paging Encoder 319 DTMF Sequence Encoder 324 EDACS Encoder 328 Using the EDACS Encoder 334 Function Generator Encoder 339 LTR Encoder 342 Using the LTR Encoder 346 MPT 1327 Encoder 350 Using the MPT 1327 Encoder 363 Nordic Mobile Telephone (NMT) Encoder 366 Tone Sequence Encoder 378

• 345 Chapter 10, Signaling Encoder (AF Generator 2) LTR Encoder Send Mode This field selects the output format used when Send is selected to output a sequence. Cont is typically used for LTR radio testing. • Single outputs Message 1 or Message 2 once. • Burst outputs the message the number of times specified in the Bursts field. • Cont causes the message t

• 406 Chapter 16, Radio Interface Screen Field Descriptions Field Descriptions Figure 88 The Radio Interface Screen Input Data This field trips the Test Set to latch the data on the parallel data pins that have been designated as inputs. riscrn.wmf

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