Operating instructions

2-6 Notes For All Schematics and Circuit Boards
4.0 Notes For All Schematics and Circuit Boards
* Component is frequency sensitive. Refer to the Electrical Parts List for value and usage.
1. Unless otherwise stated, resistances are in Ohms (k = 1000), and capacitances are in picofarads
(pF) or microfarads (µF).
2. DC voltages are measured from point indicated to chassis ground using a Motorola DC multime-
ter or equivalent. Transmitter measurements should be made with a 1.2 µH choke in series with
the voltage probe to prevent circuit loading.
3. Reference Designators are assigned in the following manner:
700/900 Series = Transmitter
000/200 Series = Frequency Generation
400/600 Series = Receiver
1000/2000/3000 Series = Controller
6000 Series = Keypad Board
8000 Series = GPS
9000 Series = Switches and User Interfaces
4. Interconnect Tie Point Legend:
UNSWB+ = Unswitch Battery Voltage (7.5V)
SWB+ = Switch Battery Voltage (7.5V)
R5 = Receiver Five Volts
CLK = Clock
Vdda = Regulated 3.3 Volts (for analog)
Vddd = Regulated 3.3 Volts (for digital)
SYN = Synthesizer
DACRX = Digital to Analog Voltage (For Receiver Front End Filter)
VSF = Voltage Super Filtered (5 volts)
VR = Voltage Regulator
12-LAYER CIRCUIT BOARD DETAIL VIEWING
COPPER STEPS IN PROPER LAYER SEQUENCE
Figure 2-1: 12-Layer Circuit Board Detail Viewing
Solder mask
L1
copper foil + plated
Prepreg 1080x1
L2
copper foil + plated
Prepreg 1080x1
L3
copper foil + plated
Prepreg 1080x1
L4
0.5 oz
CORE 4mil(2116*1)
L5
0.5 oz
Prepreg 1080x1
L6
0.5 oz
CORE 4mil(2116*1)
L7
0.5 oz
Prepreg 1080x1
L8
0.5 oz
CORE 4mil(2116*1)
L9
0.5 oz
Prepreg 1080x1
L10
copper foil + plated
Prepreg 1080x1
L11
copper foil + plated
Prepreg 1080x1
L12
copper foil + plated
Solder mask
12-LAYER CIRCUIT BOARD DETAIL VIEWING
Buried
via
L3-
L10
PTH
1-12