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Field Sweeping with the SDA-5000: Sweep Receiver Configuration

Box to set the Reverse Telemetry Level to an appropriate value. When

adjusting the Reverse Telemetry Level, set the level to the desired

insertion level after loss. The value used includes test point

compensation.

• Reverse Levels: This option takes you to the REV COMPENSATION

screen. From this screen you can set test point losses and the reverse

telemetry and reverse sweep insertion levels.

• The reverse telemetry level is the level of the carrier that the SDA-5000

uses to transmit telemetry data. Use the Edit Box to set the Reverse

Telemetry Level to an appropriate value. When adjusting the Reverse

Telemetry Level, set the level to the desired insertion level after loss.

The value used includes test point compensation.

NOTE: The frequency of the reverse telemetry carrier is

set on the headend unit. There is no Reverse Telemetry

Frequency setting available from the field unit.

• The reverse sweep insertion level is the level at which the unit inserts

(transmits) sweep points. All sweep points are inserted at the same

level. Use the Edit Box to set the Reverse Sweep Insertion Level to an

appropriate value. (Typically this is at a maximum of +50 dBmV to

overcome test point loss, not including the test point compensation

setting.)

NOTE: The reverse sweep plan, which is set on the

headend unit, defines the frequencies at which the sweep

points are inserted. The sweep point frequencies cannot be

adjusted on the field unit.

• Reverse Sweep Plans (Transmit and SDA Compatible Transmit

(OPT2) modes only): Reverse sweep plans are built and/or edited for

the upstream direction. The reverse channel plan must be set up on the

Transmitter. It will be automatically communicated to the field unit via the

forward telemetry.

• Sweep File Overlay: Sweep file overlay enables you to view a stored

sweep response simultaneously with a “live” sweep response for direct

comparison. The sweep file overlay option must be enabled for viewing

both traces simultaneously. With this option disabled, stored files are

displayed for normal viewing without the live response superimposed. If

the sweep file overlay option is enabled, the live response overlays the

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Wavetek 147 Specifiche Pagina 93