Timewave DSP-9+, Руководство по эксплуатации

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A contact closure operates the PTTI circuit. No external power is required. The return (shield)
side of the PTTI jack is connected to the DSP-9+ circuit and chassis ground.
Some linear amplifiers have high voltage supplies for their transmit-receive relays. If a
transceiver PTT line is used to drive both the DSP-9+ and an linear amplifier, an isolation
relay and isolation diode may be required to prevent damage to the DSP-9+ (and any other
solid state equipment connected to the PTT line).
Internal Jumpers
Some operating modes of the DSP-9+ require removal of the back panel to change settings of
internal jumpers. Details of jumper functions are described in the Operation and
Troubleshooting sections of this manual. The jumpers are preset for the most common operating
requirements and usually do not need any changes. Please do not change any of the jumpers
without reading the Operation and Troubleshooting sections of the manual. Refer to the Back
Panel Jumper Function Table on page 12 for details on the jumper functions.
To maintain the integrity of the EMI prevention measures in this unit, it is important to
replace all hardware when the unit is reassembled after opening the housing. This
includes the star washers around the audio input, line output and PTTI back panel jacks,
the ground lugs at the sides of the PC board, and all the panel screws.
4. Operation
Introduction
One knob and seven push-button switches on the front panel control the DSP-9+. Eight
jumpers located behind the back panel preset options for some of the front panel push buttons.
The knob controls power and sets the speaker and headphone audio output level of the DSP-9+.
One momentary push-button selects the operating mode of the DSP-9+. The remaining six push
buttons select the operational parameters of the DSP-9+.
Power Switch/Gain Adjust Control
The gain knob on the front panel of the DSP-9+ is the power switch/gain adjust control. Rotate
the gain control clockwise to turn on the DSP-9+ and increase the volume. Rotate the gain
control counter-clockwise to turn off the DSP-9+ and decrease the volume.
Selecting the mode
The Mode push-button on the DSP-9+ selects the Voice, CW, or Data operating mode. A
lighted LED indicates the selected operating mode.