Wavetek 3001 Instruction Manual page 43

4 .5 .1 OU T PU T ME T ER ACC UR ACY TEST
E
QUIPMEN T ί51
P
R OC E D URE
1 . Set t he ιη sιιυ me ηι controls as follows :
4- 8
FREQ VERN I ER CA L
F re quency selector 050.000
M OD UL ATIO N MODE CW
MOD UL ATIO N F
R
EQ N/A
M OD UL ATIO N F ΛΛ ' ΑΜ
N/A
OUTPUT VERN I ER Fu ll cw
OUTPUT Step Αtτeηιια tπr +10
d
Bm
2 . Cali
h
rate t
h
e
p
ower meter and power sensor . Set the
p
o
w
er meter
to
t
he +15 dBm raoge, Connect t he power sensor to
t
he fron t-panel
RF
OUT connecto r . (Wh en reading the
p
ower meter, set the range switch so
t h at the meter Indicates
h
etween 0 and -5 d Bm) .
NOTE : The i nd icated output level of the instrument is equal to the sum
of the output METER reading and the Step Attenuator setting.
T
he
d
ifference
b
etween the actual power
m
eter reading and
t
he indicated
output level is the output METER error. For examp le, the indicated out-
put level is +13 dB m
f
or an output ME TER reading of +3 dBm
a
nd an
O UTPU T Step Ατιεηυαιοr setting of +10 dBm. If the power
m
eter reading
is +13.15 d8 m, t he output ME T ER
error
is +0 .15 dB .
3. Adjust t h e front panel OUTPU T VERNI ER for α +3 dBrin output
ME T ER reading, Οbsεινε the power
m
eter reading and ma
k
e a note of the
output ME TER
error
to the ικ"aiest 0.05 (ΙΒ 1 Υό
d
ivision) . Contin ue to
adjust
t
he O UTPUT VERN IER for output ME TER reading increments of
1 dB b etween +3 arid .7
d
Bm, an d note the output ME TER error at each
rea
d
ing. As
t
he test progresses,
m
ake α note of t he
m
aximum output
ME TER erro r to
t
he
n
ea rest 0.05
d
8. The allowa ble
error
is -0 .5 dB,
R ecor d
t
he mαχίmιιιη output
M
ETER error on line 9 of the PTR .
4 . Set the instrument OUTPU T Step Attenu
d
tor to 0 dBm an d repeat
step 3 above. Record t h e m aximum output ME TER error on line 10 of
t
he P TR
.
Set ιhe ir ιs ι nrr~ent εοης rοΙ s as ίη $¢ς( ίοη 4.5 .1 .
Ζ. Set the power meter to the +15 dB m range. Connect t
h
e power serssor
to t he front-panel RE OU T connector-
3. Adjust the tr πητ-panel OUTPU T VERN I ER for α +12 dRm power
m eter reading.
4. Set t h e instrument frequency selector in 10 MHz steps b
etween 10
arid 520 MW and o b serve t h e m
aximum change in
t
he power meter
readin gs from the +12
d
Bm readi ng in step 3. Th e m
aximum allowa ble
change is 10 .75 d B.
R
ecord
t
he
m
axi mum change to the
n
earest 0.05 αθ
(Υ . division) on li n e 11 of the
P
TR
.
4 .5 .2 FL ATNE SSTEST
G Ο U ΙΡΜΕΝΤ (5)
P
ROC E D URE 1