Kenwood TR-2600A - Page 10

TR-2600A/E
CIRCUIT DESCRIPTION
Pin No. | Pin Name Function
VDD Power supply + 5V 15 1/2 VDD | Op amp center point voltage
RO Internal reception filter output signal 16 vss GND
138 MO
19
Center point reference voltage
RF
20 TS__| Not used
| 7 [ts open ~“C*ézdC:SCi ME____| Modulator enable
Open 22 sD Transmission data input pin
23 ST
u1 GND Transmission clock
Not used 24 DE Not used
25 RD Reception data output pin
Low-pass filter output signal 26 RT Reception clock
Clock playback circuit inverting input
27 xo Crystal oscillator connection pin
28 xi Crystal oscillator conneciton pin
Table 12 MN6127A Terminal function (DCL unit 1C2)
Clock playback circuit non-inverting input
Or An hRWN =
ive)
al
vss
ay ek Roe, lk fwWN=- Oo
MCF If AF
140~IGOMHz = MIX |O.7MHz AMP 455KHz IF DET.SQ AMP sp
QI6:MC3357P
reg 10.245MHz
+
BAS26
127,800MHz
137.800MHz
|
RX1.5~11.495MHz(K,M1,M3)
:
(K,MI, M3 5.5~9.495MHz(X,M2) see £3 10.24MHz
ONLY) 5,.5~7.495MHz(T,W) l
TX14,2~21,1S5MHz(K,MI)
1-2 -20.e5meecoe)
12.2~22,195MHz( M3 )
16,2~18.i95MH2(TW)
1
Oieea
|
1440.145.990MH2
at
4
s
me
TH) «92.6MHz x3 - Sete
“7 45.933MHz x3(K,M!,M3 ONLY) 140.000~ 149,99 5(T,W,M2, X)
Q5: a6:
140.000~159.99 5(K,MiyM3)
LOW POWER
sw
10 Fig. 15 Frequency-related block diagram