Ojisankoubou SDR-3 User manual

0
2018/Aug/15 version 1.00
Ojisankoubou
(c)2018 Ojisankoubou, All Rights Reserve
SDR-3
SSB transceiver experiment kit
Operating manual

1
The latest information/software is available at the following site.
Ojisankoubou Website
http://ojisankoubou.web.fc2.com/
Transistor Gijutsu Website
http://toragi.cqpub.co.jp/
The software use in this manual is the one at the time of writing this
manual. It may be change at the point of sale.
■Information / Software Location
■Important explanation items
(Please be sure to rea through)
• Even if you suffer amage or amage irectly or in irectly by
using this kit, we will not compensate at all.
• We will not respon to exchange, warranty, refun , even if you
faile to assemble or fail in use.
• This kit aims to provi e har ware that can be use in general
purpose. The one exemplifie as being able to make with this kit
shows the possibility of this kit. I i not actually make all of the
exemplifications.
• Characteristics an performance liste in this manual, Transistor
Gijutsu magazine, website, etc. are only one pro uction example,
an not all the kits guarantee the same performance. Please be
aware that there are cases where it may be goo or ba .
• Although we are carefully esigning, there is no guarantee that
there are no serious esign errors or bugs.
• Circuits, parts, boar , software, etc. may be change without
notice.
• This manual is English translation from the japanese
version of the manual.
what the English language version of the Terms says an
Japanese language version says, then the Japanese
language version shall take prece ence.

2
□DC power supply (φ2.1 center plus 5 V)
If the noise of the power supply is larger, the performance egra e.
Transformer type CVCC power supply is recommen e .
Those that were roppe by a transformer an then set to 5V with a
series regulator, is OK.
Please rop the noise sufficiently when using the switching regulator.
□Speaker with amplifier, or hea phone
□Microphone + SW (PTT)
□2 knobs (D axis)
□Spacer, screw etc.
■Other items require for using the kit
( not inclu e in the kit )

3
SW1:
Menu isplay
Long press:
Function selection menu
SW2:
Memory rea
Long press:
1. Write memory,
2. XtalFilter center frequency (= IF1) setting
SW 3:
BAND select
SW 4:
1. TX / RX test signal
2. Measurement start / stop
SW 5:
Normal spectrum isplay
Span 12k ↔6k
SW 6 - 7:
Spectrum isplay uring
signal processing
RE 1:
1. Frequency
2. Menu item selection
3. Cursor A
click:
1. Frequency step
2. Move the cursor to the peak
RE 2:
1. Volume
2. Change menu setting value
3. Test signal frequency
4. Microphone gain
5. Cursor B
click:
1. Notch frequency
Simultaneous press of SW3
an SW5:
Debug message isplay
SW8︓
TX PTT
MIC Lch : ECM(Electret Con enser Mic)
MIC Rch︓TX PTT
１-１. Operation outline 1
SW on the LCD:
TX PTT

4
SW1
SW1
SW1
SW1:
Cancel
SW4:
Write
SW1
Function Selection
Menu
Tranceiver
1.Setting
2.BPF
3.Xtal Filter
SW1
SW1 Long Press
SW1 Long press
SW1 Long Press
SW1Long Press
SW1
SW1
SW1
Power ON
Menu Write
Memory
Menu
SW1
SW1
SW1Long Press
SW1長押し
SW1Long Press
SW1長押し
SW1-4 : Don't retrieve "Ch Memory"
SW5-8 : Don't retrieve "Setting"
When you o not know where you are now,
Please press SW1 or press an hol .
Menu
SW2
Long Press
１-１. Operation outline 2

5
１-２. Operation
function selection 1.Setting
menu normal setting normal setting normal setting
RE1 select funtion frequency select menu select menu cursor A select menu cursor A select menu
RE2 volume change value change value cursor B
( difference )
change value cursor B
( difference )
change value
RE1 SW frequency step cursor A goto peak cursor A goto peak
RE2 SW notch frequency cursor B goto peak cursor B goto peak
SW1 goto function goto setting goto normal screen goto setting goto normal screen goto setting goto normal screen
Long press goto function
selection
goto function
selection
goto function
selection
goto function
selection
goto function
selection
goto function
selection
goto function
selection
SW2 memory read
Long press memory write
SW3 select BAND select BAND select BAND
SW4 test signal mode start measure start measure
SW5 normal spectrum
display mode
SW6 next signal
processing spectrum
SW7 previous signal
processing spectrum
SW8 TX
SW3 & SW5 debug log debug log debug log debug log debug log debug log debug log debug log
Tranceiver 2.BPF 3.Xtal Filter

6
SSB Tranceiver
This is the main function of this kit, SSB transceiver.
When you turn on the power it starts from this screen.
For etails, go to Chapter 3
1. Setting
We will make general settings.
For etails, go to Chapter 4
2. BPF
This is a screen for measuring the frequency characteristic of BPF.
For etails, go to Chapter 5
3. Xtal Filter
This is a screen for measuring the frequency characteristic of Xtal Filter.
There is also a function to set the center frequency of Xtal Filter to IF2 frequency.
For etails, go to Chapter 6
２-１. Function selection menu
function selection menu screen
Regar less of the screen, when you press an hol SW1, "function selection
menu screen" is isplaye .
Select function (highlight) with RE1 an press SW1 to move to the selecte
screen.

7
1. Basic operation
RE1: Frequency
RE1: Pressing RE1, then changes the frequency step
RE2: Volume change
SW1: Setting screen
SW2: Memory rea mo e
SW2: Press an hol SW2 uring rea mo e to erase memory
Press an hol SW2 to write memory
SW3: ban select
SW4: test signal
SW5: Spectrum isplay span select
SW6, SW7: Signal processing in progress Spectrum isplay
SW8: TX
３-１. Tranceiver Operation
When you turn on the power, it starts from "Tranceiver" screen.
Alternatively, select "SSB Tranceiver" from "Function selection menu screen".

8
Press SW1 to enter the setting menu.
Here you can change various settings of the transceiver.
The change settings can be save in memory (see Memory operation).
Turn RE1 to select the item, an turn RE2 to change the setting value.
When setting values are change , that setting is reflecte imme iately, so you
can check changes with listening with LPF etc.
Press SW1 again to return to the original screen.
1. MOD
Set the mo ulation / emo ulation mo e.
2. RX GAIN
Set the input sensitivity of AUDIO CODEC (IC1).
If you increase the sensitivity too much, it becomes istorte by
the strong electric fiel .
Conversely, lowering the sensitivity makes it strong against strong
electric fiel s.
3. TX GAIN
Increase the transmission output gain of AUDIO CODEC (IC1).
4. AGC
Set the AGC time constant.
メニュー画面
３-２. Tranceiver Setting 1

9
5. DENOISER
Re uce noise uring reception.
6. LPF
Sets the LPF cutoff frequency.
7. AUDIO LO
Set the low frequency tone control at reception.
8. AUDIO HI
Set the high-frequency tone control at reception.
9. HPF
Sets the HPF cutoff frequency.
３-２. Tranceiver Setting 2