Hameg HM8135-X, Руководство пользователя

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35
Subject to change without notice
S e t t i n g t h e c o n f i g u r a t i o n
The step can modifi ed for:
– FSTEP:
(frequency)
– Level STEP: (level)
– Fmod STEP: (modulation frequency)
– AM
STEP: (AM-depth)
– FM STEP: (FM-deviation)
– Phi STEP: (PM-deviation)
MENU key
Ref Sfc SWEEP
Operating the MENU key accesses the confi guration menu.
The options are selected by pressing one of the context sensitive
keys
. The return to the main display is possible by pressing
the ESC key .
Reference REF
The HM8135 is basically equipped with a temperature con-
trolled crystal oscillator (TCXO) with a reference frequency of
10 MHz.
With every access to the confi guration menu and after selecting the
reference source by the context sensitive keys
, the phaselock
loop of the reference is tested (locked or unlocked). Increased
stability for the HM8135 may be obtained from an external oscilla-
tor. The external reference frequency must be applied to the REF.
INPUT 10 MHz and the internal reference frequency is available on
the REF. OUPUT 10 MHz at the rear panel.
STOP
Caution:
If the reference frequency from an external sour-
ce is not within specifi cations, the error message
ERROR will be displayed. In this case the internal
reference will be automatically activated.
Special function SFC
After selecting the SFC option in the confi guration menu, the
display shows:
The special function can be selected by pressing the context
sensitive keys
.
Beeper BEEP
The built-in beeper will react to every key stroke and will indicate
any operation errors. The activation and the adjust-ment of the
volume is done in the beeper menu:
– Soft (soft sound)
– Loud
(loud sound)
– None (no sound)
The characteristic of the beeper can be selected by pressing
the context sensitive keys
. A triangle points out the cur-
rent state.
Encoder ENCO
In this menu the activation of the rotary control is done by
selecting the ON or OFF option with the context sensitive keys
. A triangle points out the current state.
STOP
Caution:
Think to check this option in case of no operating of
the rotary.
Interface Com
The HM8135 is basically equipped with the serial interface. The
instrument is prepared for the installation of either an optional
RS-232 (HO890), IEEE-488 (HO880) or an USB (HO870) inter-
face (all galvanically isolated). Only the baud rate of the serial
interface can be modifi ed. The optional interface is chosen
by operating the context sensitive keys. After power-on the
serial interface is activated by default. If you want the optional
interface to be activated after power-on, store the instruments
settings (optional interface activated) in the confi guration me-
mory 0.
STOP
If there is any optional interface installed in your
instrument and not displayed in this menu, please
contact the HAMEG Service (serciec@hameg.de).
Serial interface
RS232 (DEFAULT) RS232 (DEFAULT)
4800 NONE 8 1 4800 NONE 8 1
It is possible to select the transmission rates 300, 600, 1200,
2400, 4800, 9600 or 19200 baud by pressing the context sensitive
key
. The other parameters are fi xed:
– no parity
– 8 data bits
– 1 stop bit
Display LCD
The contrast and the illumination of the display is adjusted
by pressing one of the four context sensitive keys
, corres-
ponding to + or –.
SWEEP
After selecting the SWEEP option in the confi guration menu,
the display shows:
* * * * * * SWEEP MENU
Start Stop Time Off