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Фрагмент инструкции
Chapter 2 Basic Operation Configuring the RF Output Configuring a Ramp Sweep for a Master/Slave Setup This procedure shows you how to configure two PSGs and an 8757D to work in a master/slave setup. 1. Set up the equipment as shown in Figure 2-7. Use a 9-pin, D-subminiature, male RS-232 cable with the pin configuration shown in Figure 2-8 on page 46 to connect the auxiliary interfaces of the two PSGs. You can also order the cable (part number 8120-8806) from Agilent Technologies. By connecting the master PSG’s 10 MHz reference standard to the slave PSG’s 10 MHz reference input, the master’s timebase supplies the frequency reference for both PSGs. Figure 2-7 Master/Slave Equipment Setup Chapter 2 Basic Operation Configuring the RF Output Figure 2-8 RS-232 Pin Configuration 2. Set up the slave PSG’s frequency and power settings. By setting up the slave first, you avoid synchronization problems. 3. Set up the master PSG’s frequency, power, and sweep time settings. The two PSGs can have different frequency and power settings for ramp sweep. 4. Set the slave PSG’s sweep time to match that of the master. Sweep times must be the same for both PSGs. 5. Set the slave PSG to continuous triggering. The slave must be set to continuous triggering, but the master can be set to any triggering mode. 6. On the slave PSG, press Sweep/List > Sweep Type > Sweep Control > Slave. This sets the PSG to operate in slave mode. 7. On the master PSG, press Sweep/List > Sweep Type > Sweep Control > Master. This sets the PSG to operate in master mode. Chapter 2 Basic Operation Configuring the RF Output Extending the Frequency Range with a mm-Wave Source Module The RF output frequency of the signal generator can be multiplied using an Agilent 83550 Series millimeter-wave source module. The signal generator/mm-wave source module’s output is automatically leveled when the instruments are connected. The output frequency range depends on the specific mm-wave source module. NOTE To ensure adequate RF amplitude at the mm-wave source module RF input, when using an E8267C PSG, E8247C PSG with Option 1EA, or E8257C PSG with Option 1EA, maximum amplitude loss through the adapters and cables connected between the signal generator’s RF output and the mm-wave source module’s RF input should be less than 1.5 dB. Required Equipment • Agilent 83550 Series millimeter-wave source module • Agilent 8349B microwave amplifier Signal generators without Option 1EA (E8247C PSG and E8257C PSG) require an Agilent 8349B microwave amplifier. Signal generators with Option 1EA can drive the output of millimeter-wave source modules to maximum specified power without a microwave amplifier. • cables and adapters as required Connect the Equipment CAUTION To prevent damage to the signal generator, turn off the line power to the signal generator before connecting the source module interface cable to the rear panel SOURCE MODULE interface connector. 1. Turn off the signal generator’s line power. 2. Connect the equipment as shown. • E8247C PSG and E8257C PSG without Option 1EA, use the setup in Figure 2-9. • E8267C PSG or E8247C PSG and E8257C PSG with Option 1EA, use the setup in Figure 2-10. Chapter 2 Basic Operation Configuring the RF Output Figure 2-9 Setup for E8247C PSG and E8257C PSG without Option 1EA Setting the Signal Generator 1. Turn on the signal generator’s line power. Upon power-up, the signal generator automatically: • senses the mm-wave source module, • switches the signal generator’s leveling mode to external/source module (power is leveled at the mm-wave source module output), • sets the mm-wave source module frequency and amplitude to the source module’s preset values, and •in the FREQUENCY and AMPLITUDE areas of the signal generator, displays the RF output frequency and amplitude values available at the mm-wave source module output. Chapter 2 Basic Operation Configuring the RF Output Figure 2-10 Setup for E8267C PSG or E8247C PSG and E8257C PSG with Option 1EA The MMMOD indicator in the FREQUENCYarea and the MM indicator in the AMPLITUDE area of the signal generator’s display indicate that the mm-wave source module is active. NOTE Refer to the mm-wave source module specifications for the specific frequency and amplitude ranges. 2. If the RF OFF annunciator is displayed, press RF On/Off. Leveled power should be available at the output of the millimeter-wave source module. To obtain flatness-corrected power, refer to “Creating and Applying User Flatness Correction” on page 64. Chapter 2 Basic Operation Modulating a Signal Modulating a Signal This section describes how to turn on a modulation format, and how to apply it to the RF output. Turning On a Modulation Format A modulation format can be turned on prior to or after setting the signal parameters. 1. Access the first menu within the modulation format. This menu displays a softkey that associates the format’s name with off and on. For example, AM > AM Off On. For some formats, the off/on key may appear i...
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