Menu Key; Reference Ref; Special Function Sfc; Beeper Beep - Hameg Instruments Hm8135 Handbuch

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
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
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.
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.
STOP

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)

SWEEP

, the phaselock
S e t t i n g t h e c o n f i g u r a t i o n
The characteristic of the beeper can be selected by pressing
the context sensitive keys
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.
Caution:
Think to check this option in case of no operating of
the rotary.
STOP

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.
If there is any optional interface installed in your
instrument and not displayed in this menu, please
contact the HAMEG Service (serciec@hameg.de).
STOP

Serial interface

RS232 (DEFAULT) RS232 (DEFAULT)
4800 4800 NONE NONE
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
ponding to + or –.
SWEEP
After selecting the SWEEP option in the confi guration menu,
the display shows:
* * * SWEEP MENU
Start Stop Time
. A triangle points out the cur-
8 8 1 1
, corres-
* * *
Off
Subject to change without notice
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