SDT 5000 User Manual
Document MBUD-0109v11
10.1.4 INFORMATION FIELD
The Information Field is a short text message that provides error and help messages to the
user as he uses the screen. It is displayed on the second line from the bottom of the screen and
on the left hand side. If an incorrect value (e.g. an illegal frequency) is entered into an Edit
Field, the Information Field will provide information on the error and allow the user to
correct his mistake. Virtually all fields on the screen have associated error and help messages.
The Information Field is displayed using normal video characters.
10.1.5 SELECT FIELD
A Select Field for entering commands is provided on the bottom right of the screen. In
addition to entering commands, the Select Field may also be used to enter selection numbers.
Selection numbers provide a quick way for the user to enter other screens, enter an Edit Field,
or enter a Confirmation Field. In
Screen 3 we could simply type <1> <ENTER> to enter Edit Field 1 and the cursor would
move to the first character in the field. Once a field is entered the user may change the field
or move to another field, see
Using the Keyboard
on how to change field values.
The Select Field is displayed using reverse video characters.
10.1.6 STATUS LINE
The last line on the VT100 (line 24), displays the Status Line. Data on the Status Line is
updated in real time and provides important information on the MET’s state. There are
currently five important pieces of information displayed:
Operational State
The SDT 5000 has a number of possible states, and they
are described in the Section 9, SDT 5000 Operational
States
.
Sync
The SDT 5000 may be in SYNC or in the NO SYNC
state with relation to the Data Hub (DH) signal, or it may
be in PILOT state. If the Sync state is SYNC then the
SDT 5000 is synchronized with the Data Hub and is
receiving the Data Hub signal. NO SYNC indicates the
unit is not synchronized with the Data Hub. PILOT state
is used for automatically calibrating the SDT 5000 to the
Data Hub signal.
DSP Mode
Display of the current DSP mode should read NORMAL
after a successful power-up or ACQ when the SDT 5000
is trying to acquire a frequency.
Frequency Current
frequency
the SDT 5000 is tuned.
Signal to Noise Ratio
The SNR provides information on whether or not a clear
signal is being received. If this value drops below about
3 dB the SDT 5000 will have difficulty maintaining
Sync and experience a very high bit error rate.
Number of User Messages
Number of user messages that haven’t been read.
Version 1.1, 03/24/06
Page 49
