Specifications

15
(6) Step frequency - STEP: This value is displayed in kHz and indicates how wide one step
represents out of the 320 steps across the X-axis. The example of page 14 shows 31.250kHz as one
step which is obtained by taking the SPAN of 10MHz and dividing it by 320, the result is 31.250kHz -
since the X-axis is 10MHz wide in this example. In the Step resolution mode, it is possible to specify
the frequency bandwidth to be ‘one step’ rather than an often seemingly arbitrary value.
(7) Operation mode - OP.MODE: This legend indicates which one of three operating modes is
selected, there are three possibilities:
Spectrum Spectrum analyser mode
StepReso Step resolution mode
Channel Channel scope mode
(8) Marker + (9) Marker information: The marker (8) is a vertical line drawn on the LCD which can
be moved across the horizontal axis. The marker is capable of providing the instantaneous reading of
information where the marker is placed such as (9) frequency or signal strength of marker location.
In the marker menu, in addition to the instantaneous reading of marker information, the peak
search facility is provided. Any signals which are out of scale cannot be read. It is necessary to
adjust the gain for input signal level, the displayed signal appears vertically while the calibration lines
of the graticule are represented horizontally.
(10) Valid indicator: This indicates which method of data input is valid. When a DOT  is shown, the
main dial is operational whereas when SQUARE ¢ is displayed, entry through the keypad is
operational.
(11) Receiver information: This section of the LCD provides various operating conditions of the
companion receiver such as receiving frequency, modulation mode, tuning step and ATT on/off.
The information can be toggle on and off via the key sequence FUNC 5 (DISP)
(12) Signal indicator + (13) Level indicator: The X-axis (horizontal line) indicates frequency, and
Y-axis (vertical line) indicates signal strength, so the frequency spectrum of the received signal
is indicated on the screen.
The Y-axis (vertical line) is split into six segments with each segment representing a 10dB. The level
indicator reads the input sensitivity which is shown along the Y-axis and the level is adjustable in four
levels by altering the built-in amplifier (AMPLITUDE). The X-axis is split into eight segments
indicating the frequency span (bandwidth) in use. The marker is designed to move across the one
segment by ONE full rotation of the main dial. To move the marker from one edge to another requires
EIGHT rotations of the main dial.
4-3 Main key layout
The main key pad consists of 20 individual
keys, each conveniently located for ease of
operation:
ê Function key (FUNC) on the top right
ê Receiver control keys (RX CTRL)
on the right
ê Enter key (ENT) on lower right
ê Clear key (CLR) on bottom left
The FUNC key enables activation of the second function keys. When pressed the ‘FUNC’ legend
appears in the top left corner of the LCD in reverse contrast YELLOW text.
Section 4-2, 4-3