Leader Electronics Corp. LDC-824 - Specifications

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1. Introduction
LDC-824° LDC-824S
DIGITAL COUNTER
LDC-824(S) is a digital frequency counter/timer designed to measure the frequency and period
of a signal, featuring a wide frequency range (10Hz—520MHz), a high input sensitivity (20mV rms),
and high resolution to 8 digits. The period function makes the unit outstanding for video tape re-
corder service applications. This instrument can be used for adjustment, test and repair of audio
instruments, AM/FM radios, TVs, CB radios, computer clocks, amateur-radios, electronic watches,
musical instruments, etc. The LDC-824(S) is small and portable. A big bright fluorescent display
assures easy readability of values. The green display does not induce eye fatigue even after an extended
period of viewing. Readout miscounts are reduced by zero-blanking, unit-display (kHz, MHz, ms) and
overrange display. The use of LSI and MSI in the internal circuit assures reliable performance and less.
power consumption.
2. Specifications
Frequency Measurements
Range
Gate time
Resolution
Accuracy
Period Measurements
Range
Multiplication Factors
Resolution
Accuracy
Input Section
Input sensitivity
(MQ)
(502)
Attenuator
Coupling
Input impedance
Maximum input voltage
(1MQ)
(502)
10Hz — 80MHz (direct), 50MHz — 520MHz (pre-scaler)
0.1s, 1s, 10s
10Hz,
1Hz,
0.1Hz
(direct),
100Hz,
10Hz,
1Hz
(pre-scaler)
+1 count + time base accuracy
100ms — lus
X10, X100, X 1000
10pus, lus, O.1pus
+1 count + time base accuracy + trigger error
20m Vrms (10Hz — 80MHz)
50m Vrms (80MHz — 520MHz)
20mVrms (100kHz — 80MHz)
50m Vrms (80MHz — 520MHz)
1, 1/10
AC
Switchable 1MQ and 502.
10Hz — 400Hz : 100Vrms
400Hz — 100kHz : 20Vrms
100kHz — 520MHz: 5Vrms
100kHz — 520MHz: 5Vrms