SME Digital Modulation
1038.6002.02 2.103 E-13
STATE
ON Switching on ERMES. The RF frequency is set to the value
determined by the selection of CHANNEL. The status line
indicates the word ERMES, the batch, the number of
subsequence, and the type of data sent. "MSG" indicates
message data, "- - -" indicates fill data.
With every change from STATE OFF to STATE ON, the
data for the memory extension are recalculated and written
into list "XMEM". Every change of one of the ERMES
parameters, except for MESSAGE SEQUENCE MODE,
requires the data to be recalculated. During STATE ON,
every change of the parameters thus generates a warning
"ERMES settings and output signal mismatch". The data
can be recalculated either by switching over to STATE
OFF / STATE ON or by triggering action RECALCULATE
➤
.
OFF Switching off ERMES
IEC-bus command :SOUR:ERM:STAT ON
CHANNEL...
Opens a window to select the RF channel used. 16 channels with
the appropriate frequencies can be selected:
Channel 0: 169,425 MHz Channel 8: 169,625 MHz
Channel 1: 169,450 MHz Channel 9: 169,650 MHz
Channel 2: 169,475 MHz Channel 10: 169,675 MHz
Channel 3: 169,500 MHz Channel 11: 169,700 MHz
Channel 4: 169,525 MHz Channel 12: 169,725 MHz
Channel 5: 169,550 MHz Channel 13: 169,750 MHz
Channel 6: 169,575 MHz Channel 14: 169,775 MHz
Channel 7: 169,600 MHz Channel 15: 169,800 MHz
The selection of the channel also influences the structure of the
ERMES data. Thus the channel cannot be changed by readjusting
the frequency in the FREQUENCY menu or via the [FREQ] key.
Readjusting the RF output frequency by means of the [FREQ] key or
in the FREQUENCY menu is possible, however, message "ERMES
channel / Frequency mismatch" is displayed.
IEC-bus command :SOUR:ERM:CHAN 1
RECALCULATE Ð
Triggers a recalculation of the data for the "XMEM" list. This action
must be triggered after every change of the parameters, except for
MESSAGE SEQUENCE MODE.
IEC-bus command :SOUR:ERM:STAT OFF; STAT ON
---
NETWORK INFORMATION --
The parameters of the network information set the data denoting the
network the SME simulates in greater detail. These data are
included in every message (cf. ERMES standard).
ZONE / COUNTRY CODE
Input value of the zone and country code. Germany has the value
262.
IEC-bus command :SOUR:ERM:NINF:ZCO 262
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