Test And Alignment Instructions - Sennheiser BFR 1051 Brief Description

6. TEST AND ALIGNMENT INSTRUCTIONS
No. | Measurement, | Signal input
adjustment
Test point | Desired | Adjuster _| Remarks
value
Current
'consumption:
2 — | Tuner operating
voltage i
Tuner alignment
" E R F generator:
receiver frequi
RE: 1 mVt60 dB pV).
Socket Ant.A,
dev, 56 KHz,
mod.:'t kHz:
: f z g :
2.2 | Precise tuner Reduce RF voltage UPM 550 - 1 and J04 max. AF as2.1. as 2.1.
alignment until after the AF oscilloscope
{supply tine A) output signal has
reached the
original value - 3d8
(RF: approx.
0.7-1 pV}
Final tuner UPM 550 - 1 and
alignment oscilloscope
Ca line A)
| Hold coaxial ak a pen cable ends near the oscilator (open shielding a
| os Nepain 5 MHz). Me ftealleocy ether than the ¢ sci
Lo 'oscillator setting, If
3 Field strength as 2.1. DC voltmeter TP2
voltage VT-A |
Values are typ.
values as per curve
ey
ot settings. as
: scribed in: ase
a2 |Fieldsteength | AF: OGEnV, DC voltmeter
| TP2 0.65 VDC
voltage VT-A other settings as de- | + 30%
scribed in 2.1. |
Bae cen ae
'other settings as dé
Sefibedin2.4.<.
os
5 FF signal level RF: 20-dBuY, RF tevel VROS RF indicator:
indicator other settings as de-
; indicator 3 LEDs light up
scribed in 2.1 f
Set output to most
istinctive Wavetor
nd maximum level
6.1 | Precise tuner. Reduce RF voltage
UPM 550 - 1 and J04 max. AF as 6. ; as 6.
alignment until after the AF oscilloscope !
(supply fine B) output signalhas
reached the
original value - S4B
{RF: approx.
07-10)
BFR 1051
04/93~10