Wavetek 147 Specifikace stáhnout pdf (Strana 296)

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SDA-5500/SDA-5510 Sweep Configuration: Forward Sweep Configuration (SDA-5500)

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Fig. 14-4 The SWEEP TRANSCEIVER Main Menu

Use the up and down arrow keys or the numeric keypad to enter the

telemetry frequency.

Do not place the telemetry signal too close to the diplex filter cut-off

frequency in that roll-off may attenuate the telemetry signal to the degree

that communication fails. This same caution applies to placing the signal in

the high end roll-off region. Take care not to place the telemetry too far into

the edges of the forward path band. Inconsistent operation may result if the

telemetry channel is too close to the band edge. In order to sweep with an

SDA-5500, an SDA field unit must have matching telemetry frequency

values.

Forward Telemetry Level

This is the level of the carrier that the SDA-5500 uses to transmit telemetry

data. Use the Edit Box to set the telemetry level to an appropriate value.

When adjusting the telemetry level, take into consideration the following

losses: system, summing network, test point, and amplifier desired input.

Use the up and down arrow keys or the numeric keypad to enter the

telemetry level (20-50 dBmV).

Forward Sweep Insertion Level

This is the level at which the SDA-5500 inserts (transmits) sweep points. All

sweep points are inserted at the same level. Use the Edit Box to set the

sweep insertion level to an appropriate value (This will typically be at

maximum (+50 dBmV) to over come test point loss.).

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