1.GENERAL
1.1 Description
1.2 Features
The 620R family oscilloscope are dual-channel oscilloscope with maximum sensitivity of lmV/div. The time base provides a
maximum sweep time of 0.2 uS/div .When magnified by 10,the sweep speed is 20ns/div.The vertical deflection system has
two input channels .Each channel has 12 basic deflection factors from 5mV t0 20V per division ,it can expanded to 1mV/div
by pull out x5MAG button .Each of these oscilloscope employs a 6- inch rectangular type cathode-ray tube with internal
graticule.620R/640R has cursor readout function which can display voltage, time, frequency etc. information on screen.
These oscilloscopes are sturdy, easy to operate and exhibits high operational reliability.
L) High intensity CRT with high acceleration voltage:
The CRT is a high beam transmission,high intensity pe with a high acceleration voltage of 2KV for
and
12KV for
.It displays clear readable traces even at high sweep speeds.
2) A trigger level lock function which makes the triggering adjustment unnecessary.
3) Alternate triggering:
Even an observation of two waveforms of different frequencies,the waveform of the each channel is stably triggered.
4) TV sync triggering:
The oscilloscope has a sync separator circuit for triggering of TV-V and TV-H signals.
5) CHl Output:
Terminated 50 ohm output of channel 1 signal available on rear panel for driving frequency counter or other instruments.
6) Z-Axis Input:
Intensity modulation capability permits time or frequency markers to be added.Trace blank with positive signal,TTL
compatible.
7) X-Y operation:
Set the switch to X-Y.Then the instrument works as an X-Y oscilloscope.CHl can be applied as horizontal deflection (X-axis)
while CH2 provide vertical deflection(Y-axis).
ty
BF 5620NF/620R
640B/650B/640BF/650BF/640R/650R
620B/620
1
2
2.TECHNICAL SPECIFICATIONS
2 0MHz OSCIL LOSC OPE
40M Hz /50 MHz O SCILL OSCO PE
620B /5620N F/620B F/620 R
64 0B/65 0B/640 BF/65 0BF/64 0R/650 R
5mV~20V/D IV,12steps in 1 -2-5sequence (5620NF: 5m V-5V/DIV, 10steps in 1-2-5sequence)
≤
≤
3% (x5MA G:
5%)
(562 0NF:D evoid)
±
±
（
10
°
° ）
C -35
C
Continuously variable to l/2.5 or less tha n panel-indicated va lue.
D C~20M Hz(x5 MAG :DC~7 MHz)
D C~4OM Hz(x5 MAG: DC~15 MHz)
AC coupling:Low li mit frequency 10Hz.( With referenc e to 100KHz ,8DIV.F requen cy response w ith -3d B)
Appro x.17.5nS(x5 MAG:A pprox.50nS)
Approx.8.75n S/8.0nS(x5MAG:Ap prox.50nS)
Appro x.lM ohm //Approx.25pF
≤ ±
o
0.l D IV of amplitu de cha nge wh en wav ef rm of 2 DI V at gr aticule center is mov ed vert ically.
CHI :CHl single ch annel.
CH2 :CH2 single channel.
D UAL :CHI an d CH2 are displayed.ALT or CHOP selectable at any sw eep rat e.
ADD: CH1+C H2 alg ebraic additio n.
Appro x.250K Hz
AC,G ND,DC
4 00V (D C+AC peak),AC:fre quenc y lkHz or lowe r.
When set prob e switch at l:1 ,the maximum effec tive re adout i s 160V pp(56Vrms at sine wa ve),
or se t probe switch at 10:1,the m aximum effec tive rea dout is 400Vpp(140 Vrms at sine w ave).
5 0:1 or b etter a t 50KH z sinus oidal w ave.(W hen se nsitivi ties of
an d CH2 are se t equally)
CH1
> 1000:l at 50K Hz
> 30:l
at 15M Hz
>30:1
at 35MH Z/45M Hz
At least 20 mV/DIV into a 50 ohm termin ation.B andwi dth is 5 0Hz to at least 5MHz .
B alance d poin t variat ion:
1 DIV( Refere nce at center graticu le.)
≤
Sens itivity
Sensitivit y accu racy
Vernie r Vertical sen sitivity
Fre quency bandw idth
Rise time
I nput im pedan ce
Line arity
Wertica l mod es
C hopping repe tition f requen cy
Input c ouplin g
Max imum input voltage
C ommo n mod e rejection rat io
Isolati on between channel s
(At 5mV/ DIV ra nge)
CH 1 sig nal out put
C H 2 I NV BA L.
MODEL
SP ECIFICATIONS
Ta ble o ne