Racal Instruments 3156B, Руководство пользователя

Страница: 117 / 385

3156B User Manual
Racal Instrument © 2005 WaveCAD 4-25
Figure 4-10 The Modulation Panel 2
The Modulation Panel 2, as shown in Figure 4-10, controls FSK,
Sweep and Frequency Hop modulation. The Modulation and Enable
groups are duplicated from the Modulation Panel 1. Description of the
controls in this panel is given below.
FSK
The FSK group contains parameters for controlling the FSK function.
The “0” Frequency represents the carrier frequency and the “1”
Frequency represents the frequency to where the carrier will shift. The
data which is required for the FSK sequence is programmed and
stored in the FSK data table and the rate of which the frequency
advances through the data is programmed using the Baud Rate
parameter. Finally, the marker index points to a bit in the FSK
sequence of which, when reached, the SYNC out will generate a
marker pulse.
To change the FSK parameters point and click on one of the FSK
parameters. The value that is associated with the lit LED is displayed
on the digital display. You can use the dial, keyboard, or the [
↑
] [
↓
}
keys to adjust the readout to the required setting. After you modify the
reading, press Execute to update the 3156B with the new reading.